Snooker Theory...Center to edge aiming has been around for decades. Many of us spent time with Hal Houle, over the last 20 years of his life. Stan's CTE Pro One is one version. The SPF Group teach another version of CTE, along with several other aiming methods. Students choose the one(s) they prefer. Many pros use bits and pieces of several aiming methods. Many players shoot by "feel", which is another legitimate aiming method. Aiming is perceptual...we all perceive differently, just like we're built differently, we think differently, and we learn differently. There's no one-size-fits-all in anything pool. There is no one absolutely correct way to aim. There are lots of ways (and several necessary variables)...find one that works for you and practice. Given that, there is no aiming method/system ever devised that can make up for a poor stroke.
Scott Lee
2019 PBIA Instructor of the Year
Director, SPF National Pool School Tour